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The Republican said he is not one who will campaign just stay in the spotlight.

“If it becomes apparent that it’s not something that people are interested in, whenever something like that would happen, I would not ever be one of those people who’s just there for the purpose of being there,” Carson said.

Carson, once a top-tiered candidate, was ahead of GOP front-runner Donald Trump in Iowa in October. Trump began to attack Carson’s youthful indiscretions, but Carson’s polling numbers saw their biggest decline after the November terrorist attacks in Paris.

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Three key staffers resigned in December after rumors of a shakeup circulated around the Carson camp. Carson’s wife, Candy, started making rounds doing news interviews and speaking to voters in Iowa about her book, A Doctor in the House. She doesn’t speak directly about Carson’s campaign, but instead focuses on his personal history, character and their life together.

Carson answered questions about expenditures in his campaign, addressing speculation his campaign was bloated and funds were being misdirected into fundraising instead of infrastructure. Carson has raised a significant amount of money – an estimated $52 million as of mid-December. Approximately $20 million was raised after Carson’s poll numbers began declining, according to campaign officials.

“I would simply say that a startup organization, starting up in March with no donor base, no Rolodex, no organization, the expenses involved are considerably higher than an organization that is already in place,” Carson said, adding costs are lower now since his organization is functioning.